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 End-User Documentation
View this topic on docs.devexpress.com (Learn more)

TreeListColumn.SortIndex Property

Gets the index of the column in the sorting columns list.

Namespace:DevExpress.XtraTreeList.Columns
Assembly:DevExpress.XtraTreeList.v19.2.dll

Expanded Syntax

Property value

Type: Int32
An integer value representing the zero-based index of the column within the sorting columns list.
The default is -1.

Expanded Remarks

The Tree List control enables you to sort data by values. This can be done by setting the SortOrder property of columns to an appropriate enumeration value. End-users can do the same by clicking the desired column headers while holding the SHIFT key down.

The order of applying sorting to columns is significant. When applying sorting by a single column, each group of nodes that have the same parent is sorted. The column is added into the internal sorting columns list at the zero position. When sorting an additional column, only nodes that have the same value in the first column are rearranged, etc. Further columns are also added to the sorting columns list at appropriate positions. You can refer to the Sorting topic for details on the sorting algorithm implemented in the XtraTreeList.

The SortIndex property enables you to determine the position of the column in the sorting columns list. You can get the total number of columns involved in sorting using the TreeList.SortedColumnCount property.

Expanded Example

The following example creates a TreeList (see TreeList) at runtime and shows how to perform basic customization tasks:

  • Bind the treelist to a data source
  • Specify the key fields that form a hierarchy
  • Access automatically created columns
  • Set a custom row height
  • Customize column captions (using HTML tags) and cell appearance settings
  • Create unbound columns and create Excel-style format conditions based on these column values
  • Assign an in-place editor (a spin editor) to columns
  • Sort data
  • Calculate total summaries
  • Filter nodes
  • Hide columns and calculate column "best" widths
  • Locate and expand nodes
  • Focus a specific cell
  • Specify DataAnnotation attributes at the data source level (the "p0" display format for the MarketShare field)

Expanded See Also

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